5.0 mL sample of hydrogen gas is collected at a pressure of 97.5 kPa when the temperature is 18°C. Calculate the volume this gas would occupy at STP in Liters.
STP stands for Standard Temperature and Pressure. This means that the temperature is 0°C and the pressure is 101.3 kPa = 1 atm.
2. (11 pts) Balance the following equation: _____ H2 + _____ N2 → _____NH3
A. Whattypeofreactionisthis?________________________
B. Arethenumberofmolesconservedinthebalancedequation?Justifyyourreasoningin complete sentences.
C. Howdoesthebalancedequationsupportthelawofconservationofmass,ingrams?Justify your reasoning in complete sentences.
D. Howmanymolesofammonia(NH3)canbeproducedfromthereactionof4.0litersofhydrogen at 50.0oC and 1.2atm of pressure with excess nitrogen?
Ans to 2D: _____________________

Standard Pressures: 1 atm = 760 torr = 760 mmHg = 101.3 kPa = 101,300 Pa = 14.7 psi
Water Vapor Pressure Table
TP (°C) (mmHg)
TP (°C) (mmHg)
TP (°C mmHg)
0.0 4.6
5.0 6.5 10.0 9.2 12.5 10.9 15.0 12.8 15.5 13.2 16.0 13.6 16.5 14.1 17.0 14.5 17.5 15.0 18.0 15.5 18.5 16.0 19.9 16.5
19.5 17.0 20.0 17.5 20.5 18.1 21.0 18.6 21.5 19.2 22.0 19.8 22.5 20.4 23.0 21.1 23.5 21.7 24.0 22.4 24.5 23.1 25.0 23.8 26.0 25.2
27.0 26.7 28.0 28.3 29.0 30.0 30.0 31.8 35.0 42.2 40.0 55.3 50.0 92.5 60.0 149.4 70.0 233.7 80.0 355.1 90.0 525.8 95.0 633.9
100.0 760.0
3. (8 pts) Ammonium nitrite decomposes to give off nitrogen gas and liquid water. How many grams of ammonium nitrite must have reacted if 2.58 L of gas was collected over water in a gas collecting tube at 21.0oC and 97.8 kPa?
Balanced equation: _______________________________________________________________
Ans to 3: _________________
(6 pts) Will the volume of nitrogen (from the previous problem) INCREASE, DECREASE or remain the SAME if... *Explain briefly*
A. ...the experiment is done at significantly higher temperature? __________
B. ...the amount of ammonium nitrite was increased? __________
C. ...the experiment was not collected over water? __________

4. (10 pts) 900.0 mL of 3.00M phosphoric acid, H3PO4, reacts with 235 grams of iron (III) carbonate. Balanced Equation: Fe2(CO3)3 + 2H3PO4 → 2FePO4 + 3H2O + 3CO2
a. Determine the limiting reactant. Show all work!
Ans to 4a: _________________
b. How many milliters of carbon dioxide gas can be produced at 78°C at 45.5 psi pressure with 900.0 mL of 3.00M phosphoric acid and 235 grams of iron (III) carbonate?
Ans to 4b: _________________

Answers

Answer 1

1. To find the volume of a gas at STP, we can use the ideal gas law, which is an equation that relates the pressure, volume, temperature and amount of a gas. The equation is:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant and T is the temperature.

We can rearrange this equation to find V:

V = nRT/P

We need to make sure that we use consistent units for P, V, T and R. Since we are given P in kPa and T in °C, we can use R = 8.31 J/(K⋅mol) and convert T to K by adding 273.15.

We also need to find n, which is the number of moles of hydrogen gas. We can use the molar mass of hydrogen, which is 2.02 g/mol, to convert the given mass of 5.0 mL to moles. Since 1 mL of gas at STP has a mass of 0.0899 g, we have:

5.0 mL × 0.0899 g/mL ÷ 2.02 g/mol = 0.00222 mol

Now we can plug in the values into the equation for V:

V = (0.00222 mol)(8.31 J/(K⋅mol))(273.15 + 18) K / (97.5 kPa)

V = 0.00507 m^3

To convert m^3 to L, we multiply by 1000:

V = 5.07 L

Therefore, the volume of hydrogen gas at STP is about 5.07 L.

2. To balance the equation for the reaction of hydrogen and nitrogen to form ammonia, we need to make sure that the number of atoms of each element is equal on both sides of the equation. We can do this by adjusting the coefficients (the numbers in front of each compound) until they match.

One possible way to balance the equation is:

3H2 + N2 → 2NH3

A. This type of reaction is called a synthesis reaction or a combination reaction, because two or more substances combine to form a single product.

B. The number of moles are conserved in the balanced equation, because there is no change in the total number of molecules involved in the reaction. According to the balanced equation, three moles of hydrogen react with one mole of nitrogen to produce two moles of ammonia.

C. The balanced equation supports the law of conservation of mass, which states that mass cannot be created or destroyed in a chemical reaction. According to the balanced equation, the total mass of the reactants is equal to the total mass of the product, because each atom has a fixed mass and no atoms are lost or gained in the reaction.

D. To find how many moles of ammonia can be produced from 4.0 liters of hydrogen at 50°C and 1.2 atm of pressure with excess nitrogen, we need to use the ideal gas law again to find how many moles of hydrogen are present:

PV = nRT

n = PV/RT

n = (1.2 atm)(4.0 L) / ((0.082 L⋅atm)/(K⋅mol))(273 + 50) K)

n = 0.19 mol

Since we have excess nitrogen, hydrogen is the limiting reactant, meaning that it will be completely consumed in the reaction and determine how much ammonia can be produced.

According to the balanced equation, three moles of hydrogen produce two moles of ammonia, so we can use this ratio to find how many moles of ammonia are produced from 0.19 mol of hydrogen:

(2 mol NH3 / 3 mol H2) × 0.19 mol H2 = 0.13 mol NH3

Therefore, about 0.13 moles of ammonia can be produced from 4.0 liters of hydrogen at 50°C and 1.2 atm with excess nitrogen.

Answer 2
Can you put a photo we can’t understand anything of this text

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How many moles of Al would be produced from 20 moles of Al2O3?
2Al2O3
->
4A1 + 302

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Answer:

[tex]\displaystyle 40 \ mol \ Al[/tex]

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Chemistry

Stoichiometry

Using Dimensional AnalysisExplanation:

Step 1: Define

[RxN - Balanced] 2Al₂O₃ → 4Al + 3O₂

[Given] 20 mol Al₂O₃

Step 2: Identify Conversions

[RxN] 2 mol Al₂O₃ → 4 mol Al

Step 3: Stoich

[DA] Set up:                                                                                                     [tex]\displaystyle 20 \ mol \ Al_2O_3(\frac{4 \ mol \ Al}{2 \ mol \ Al_2O_3})[/tex][DA] Multiply/Divide [Cancel out units]:                                                         [tex]\displaystyle 40 \ mol \ Al[/tex]

Step 4:Check

Follow sig fig rules and round. We are given 1 sig fig.

Since our final answer already has 1 sig fig, there is no need to round.

differences between alkalis, bases and acids? (answer for many points :) )

Answers

Explanation:

protons.

An acid can also be thought of as a chemical that can neutralize a base. Similarly, a base can neutralize an acid.

Acids turn litmus paper red, while bases make litmus paper turn blue.

Some examples of acids are sulfuric acid, hydrochloric acid, nitric acid, and so on. Some examples of bases are sodium hydroxide, potassium hydroxide, and so on.

Acids generally taste sour, while bases have a bitter taste.

Alkalis are the bases that are water-soluble, which means that they dissolve in water. In other words, not all bases are water-soluble, and only the water-soluble bases are known as alkalis. An example of an alkali is sodium hydroxide. It is a base because it can neutralize an acid, and because it is water-soluble, it is an alkali. An example of a base that is not alkali is copper oxide. This chemical can neutralize an acid, but it is insoluble in water.

In other words, all alkali are bases but not all bases are alkalis.

Also, an alkali has a hydroxide group, while a base has an oxide group in it.

Which change will cause gravitational force between and a soccer ball to increase?

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Answer:

Moving the balls closer together. The distance decreases and force increases.

how many moles of oxygen gas are produced in the decomposition of 5.00g of potassium chlorate?
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Answers

Answer:

0.0612 moles of O2 produced

Explanation:

     First we convert from grams of Potassium Chlorate to moles..

Amu = 122.5

5.00g / 122.5 g = 0.0408163265 moles of Potassium Chlorate

    Now we need to use the chemical equation to find the ratio of Potassium Chlorate to Oxygen... But first, we need to balance it

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Balanced Chemical Equation : 2KClO3 = 3O2 + 2KCl

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We can see that for every 2 moles of Potassium Chlorate that are decomposing, we have 3 moles of oxygen gas produced.

So, we will set up our conversion factor like this:

0.0408163265 moles KClO3 *   3 moles Oxygen

                                                     -------------------------

                                                     2 moles KClO3

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ASAP PLEASEE

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Answer:

it will have 6 valence electrons

it will gain electrons

charge will be 2-

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Explanation:

what are the unit given for the questions

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Answer:

A mixture is composed of two or more elements or compounds in a non-fixed ratio, which means you can vary the amount of substance in a mixture. A compound is composed of two or more elements in a fixed ratio, so you cannot vary the amount of each element in a compound

Answer:

mixture retains property of combing substances while compound has new properties that are different from combing elements...

can be separated by physical means whereas compounds can be separated by chemical or electrochemical methods

If we had 79.3 grams of Xe, would we expect a volume that is
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a
Greater than
b Equal
с
Less than

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Answer:less than

Explanation:

If we had 79.3 grams of Xe, we would expect a volume that is less than obtained with neon. So, the correct option is (C).

What is Density?

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[tex]{\displaystyle \rho ={\frac {m}{V}}}[/tex]

where ρ is density,

m is mass, and

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Explanation:

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Answer:

Systems thinking allows us to understand all the parts that make up the whole system.

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Just took the test

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Answer:

letter B is the answer

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just take a look at the atoms

Answer:

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Answer: i gotcu the answer is mass

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Answer:

Electrons are trapped inside the atom because of the attraction forces with positively charged protons that are found in the nucleus.

2 NaOH + H2SO4 ------> 2 H2O + Na2SO4
How many moles of H2O can be produced from 12.5 moles of NaOH?

Answers

Explanation:

2moles of NaOH -> 2moles of H2O

so the number of moles r equal.

hence moles of H2O is 12.5

What property allows objects to be subject to gravity?
friction
mass
inertia
acceleration

Answers

Answer:

Mass

Explanation:

19)
Why are unique atomic spectra produced by different elements?

Answers

When atoms are excited they emit light of certain wavelengths which correspond to different colors. Each element produces a unique set of spectral lines. ... Since no two elements emit the same spectral lines, elements can be identified by their line spectrum.

what best describe the process of percipitation in the water cycle

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Answer:

Precipitation is water released from clouds in the form of rain, freezing rain, sleet, snow, or hail. It is the primary connection in the water cycle that provides for the delivery of atmospheric water to the Earth. Most precipitation falls as rain.

Explanation:

What is Temperature
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Answers

Answer:

B. A measure of the average kinetic energy of a substance.

Explanation:

Temperature is a measure of the average kinetic energy of the particles in an object.

Brainlist pls!

HELPPPP!!!!
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friction
mass
inertia
acceleration

Answers

I believe it is mass? Since gravity tells the weight of something. If its wrong I apologize. But consider the rest focus more on speed.

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The microscopic size of cells enable them to function properly.
Most organisms on Earth are multi-celled.
Some cells can be shaped like a ball.
Growing children’s cells are constantly dividing.

Answers

Answer:

The answer is functioning properly ok dude?

Explanation:

Answer: "The microscopic size of cells enable them to function properly.

Most organisms on Earth are multi-celled." is false

Explanation:

In unicellular organisms, cell division is the means of reproduction; in multicellular organisms, it is the means of tissue growth and maintenance. Survival of the eukaryotes depends upon interactions between many cell types, and it is essential that a balanced distribution of types be maintained. This is achieved by the highly regulated process of cell proliferation. The growth and division of different cell populations are regulated in different ways, but the basic mechanisms are similar throughout multicellular organisms.

The planets in the solar system revolve around the Sun because the Sun is

Answers

Answer: Anyway, the basic reason why the planets revolve around, or orbit, the Sun, is that the gravity of the Sun keeps them in their orbits. ... If the Sun weren't there, the Earth would travel in a straight line. But the gravity of the Sun alters its course, causing it to travel around the Sun, in a shape very near to a circle

If you know the atomic number and the mass number of an atom of any element, you can determine the atom's composition.

A:True
B:False​

Answers

True. i hope its correct, have a good day. stay happy and stay safe

Answer:

A:true

Explanation:

The number of protons, neutrons, and electrons in an atom can be determined from a set of simple rules.

Which of the following is NOT an atom that hydrogen bonds?

Select one:
a. Oxygen
b. Nitrogen
c. Fluorine
d. Sodium

Answers

Answer:

The answer is D sodium

Explanation:

Is it okay if you help me? I'm kind of in a tight spot here. Tysmmmmmmmmmmmmm o(❁´◡`❁)o!!

Answers

Answer:

the answer is true

Explanation:

it's just true

Which is a liquid that is used to absorb and release thermal energy?

coolant
lubricant
grease
fuel

Answers

Answer

grese

Explanation:

Any liquid could absorb and release thermal energy. However, a refrigerant or a coolant absorbs heat and releases it to any area faster than any ordinary liquid such as water. So to complete the sentence: A refrigerant/cooler is a liquid that absorbs and releases thermal energy

Answer:

The correct answer is coolant.

Hope it helps. :)


You arrive at English class 45 seconds after leaving math which is 100
meters away. How fast did you travel?

Answers

Answer:

4.97097

Explanation:

You traveled 4.97097 mph.

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